Oceanic crust is composed of:
a. extrusive igneous rock.
b. intrusive igneous rock.
c. limestone.
d. shale.
e. granite.
A
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The Maldive Islands are in immediate danger from global climate change because
A) the coral reefs, which are their major tourist attraction, are dying. B) the islands have a mean elevation of three feet above sea level. C) the islands are constantly damaged by hurricanes generated by warmer sea water. D) increased rainfall has flooded much of the agricultural land.
Invertebrates and most fish are poikilotherms.
Answer the following statement true (T) or false (F)
Which of the following does not describe the role of dendritic cells during the response to combat a injected virus?
A) engulf and ingest the injected virus B) release cytokines C) migrate to the lymph nodes D) induce maturation of T cells into helper and killer forms E) All of these do charactize the role of dendritic cells.
Fog that most often forms as warm rain falls into a cold layer of surface air is called
a. ?radiation fog. b. ?evaporation (mixing) or frontal fog. c. ?advection fog. d. ?upslope fog. e. ?giant fog.